Cleaning up
    
    Mostly based on the changes in master (commit a9b2582ae9cdb)
    
    - Use systemd-rpm macros
    - Remove %triggerun for openvpn < 2.2.1 (which is way too old anyhow
      for newer Fedoras)
    - Fixed several issues with installed files
    - Fixed ./configure arguments - several of them where outdated or
      used wrong
    - Updated deprecated openvpn@.service to use Type=notify instead
      of Type=forking.  OpenVPN v2.4 have built-in support for Type=notify
    - Added README.systemd which describes the new unit files
    - Fixed wrong mixing of %doc and %{_pkgdocdir} causing duplication
      of sample and contrib directories
    - Install management-notes.txt, which contains useful information
      about the OpenVPN management interface commands
    - Don't own %{_localstatedir}/run/%{name} ... that's handled by
      tmpfiles.d/openvpn.conf instead.
    - Own /etc/openvpn{,client,server}/
    
    Resolves: rhbz#1435831, rhbz#1435036, rhbz#850257